Method of rendering electrolytic copper homogeneous.



No. 897,291. PATENTED SEPT. 1, 1908.

M. A. JULLIEN & E. L. DESSOLLE.

METHOD OF RENDERING ELECTROLYTIC COPPER HOMOGENEOUS.

- APPLICATION FILED DEO.7,1907.

UNITED sTAr as PAEENT OFFICE.

MARCEL ANDRE .TULLIEN AND EMILE LOUIS DESSOLLE, OF LEVALLOIS-PERRET, FRANCE.

METHOD OF RENDERING ELECTROLYTIC COPPER HOMOGENEOUS.

Specification of Letters Patent.

Patented Sept. 1, 1908.

Original application filed April 4, 1907, Serial No. 366,421. Divided and this application filed December 7,1907. Serial No. 405,611.

To all whom it may concern:

Be it known that we, MARCEL ANDRE J UL- LIEN and EMILE LOUIS DESSOLLE, two citizens of the Republic of France, residing at Levallois-Perret, in France, have invented a new and useful Im roved Method for Rendering Electrolytic o'pper Homogeneous, of which the following is a specification.

This invention relates to a method of rendering electrolytic copper absolutely homogeneous, so that it has the same resistance and the same tensile strength in every direction.

This ap lication is divided from our a plication led April 4th, 1907; Serial N 2). 366,421.

This method chiefly consists in a polishing action effected by means of a suitable appa-v ratus In the accompanying drawing given by way of example:-Figure, 1 is a longitudinal section ofan apparatus suitable for carrying out the invent1on,"and Fig. 2 is a cross-section on the line 22 of Fig. 1.

The apparatus comprises a water-tight wooden case or vat d 'rovided inside with two uprights b b on which rests the s indle c of a drum'or cylinder (1. At one en of the said spindle is mounted a kind of tappet or cam e, the proj ection f of which engages with a recess in an arm 9 mounted at the end of a driving shaft h which passes through one of the sides of the vat a and is provided with a stuffing boxql to revent leakage. The shaft. h is provided wit an outside driving pulleyy' for rotating the spindle h and consequently the cylinder (1.

Above the vat a is arranged a rolling track is on which can move a carriage l carrying a suitable electric or other motor m to the s indle of which is keyed a crank shaft 70.. Y he said crank shaft is connected by a rod 0 to an oscillating lever p, the pivot pin of which is supported on the carriage l. end of the saidlever p is arranged a polishing tool 9 adapted to be applied against the cylinder with a suitable pressure.

The vat (1. contains as usual a suitable electrolytic, bath, and the copper is deposited in the cylinder (1, but, as it is being At the bottom de osited, the carriage t moves longitudinally on its track 7c, the result of which is the movement of the polisher g on the cylinder (1, while at the same time the said polisher receives from the electric motor m a reciprocating movement of suitable amplitude.

In moving along the cylinder (2, the polisher 9 describes therefore on the latter a screw thread of a comparativelysmall pitch, but at the same time it describes in a continuous manner about the said screw a kind of sinusoidal curve. The amplitude of movement of the olisher g and the pitch of the screw-thread are fixed in such manner that the spires of the adjoining sinusoids intersect, and that no point of the metal surface produced on the cylinder (Z by the deposit of the electrolytic copper, escapes the action of the polisher, the pressure of which on the cylinder is suitably determined. Experience has shown that electrolytic deposit thus treated acquires an absolute homogeneity, such that the tensile strength and the resistance of the metal are the .same in every direction, while in the metal obtained by ordinary processes, the

resistance is general] greater-in the direction of the rotation t an in the longitudinal direction. The copper deposit thus treated can be used for making tubes, plates, etc. The metal thus obtained is much more suitable for the various machining operations ,than the electrolytic copper obtained by ordinary processes.

In the accompanying drawing the polishing tool is shown ap lled to the upper por tion of the cylinder but it can also move ,on any generatrix of the said cylinder with the same results.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim is A method of rendering homogeneous electrolytic copper, consisting inthe ap lication against the metal electrolytically deposited on a rotary cylinder in the vat, of a polisher having a reci rocating movement, which moves longitudinally on the cylinder in such manner that the polisher describes on the copper deposit not simply a screwthread, names to this specification in the presence of but a sinusoidal curve surrounding the two subscribing Witnesses.

spires of the screwthread, and the sinusoidal M ARCEL ANDRE JULLIEN curves interenga in in such manner that no 5 point of the surf ce escapes the action of the EMILE LOUIS DESSOLLE' polisher which is applied to the cylinder Witnesses: with a suitable pressure. JULIER' EANOW,

In testimony whereof we have afiixed our MILTON B. KIRK. 

